Magnetical and meteorological observations at Lake Athabasca and Fort Simpson [microform] /
Lefroy, J. H.(John Henry),Sir,1817-1890.
Richardson, John,Sir,1787-1865lcn00342127
Younghusband, Charles Wright,1821-1899.
London : Pub. for H.M. Stationery off., by Longman, Brown, Green, and Longmans,
1855.
"Sir John Richardson's Magnetical observations reduced and discussed by Captain Younghusband": p. 289-323.
Sabin 39843.
Sabin Group 90.
Microfiche.
Geomagnetism